…will I be able to download the improved free file on Closed Circle when it opens?
Absolutely. A free file is a free file. As far as I can figure, the software is going to let you download that as often as you like. Experiment away and get used to the pc/Mac reader-software, conversion software, loading it on your reader, etc. Eventually you can just toss that one and get the cleaned up version from Closed Circle itself.
To get back to you on that single click activation switch for Windows (here so you can find it), I had to ask my friend where it was. It is neither in Control Panel: Mouse nor in Accessibility, where most of the mouse options live, but in Windows Explorer (what you get when you look at files): Tools: Folder Options: General: Click items as follows (bottom of the General options).
(Expletive-laden rant about M$ omitted.)
😆 Thank you, Walt!